Improved automatic fan



UNITED STATES ATnN l FFICE IMPROVED AUTOMATIC FAN.

Specification forming part of Letters Patent No. dd, dated CcJobcr 4,1864.

To @ZZ whom it may concern:

Be it known that I, JOHN B. POWELL, of Philadelphia, Pennsylvania, haveinvented certain new and useful Improvements in Automatic Fans, and I dohereby declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, and tothe letters of reference marked thereon.

My invention relates toimprovements, fully described hereinafter, in theautomatic fan for which Letters Patent were granted to me on 6th day ofSeptember, A. D. 1859; and my improvements consist in placing the springfor operating the fan in the base of the implement and connecting thefan itself to a pilla-r rendered adjustable in a column attached to thebase, motion being communicated to the fan from the spring through themedium of such devices that the said fan can be adjusted both laterallyand vertically without any interruption of its free movements.

My improvements have the further advantage of rendering the instrumentportable and steady, as well as more neat and manageable, th an th atdescribed in my aforesaid patent.

In order to enable others to make and use my invention, I will nowproceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of thisspecification, Figure 1 is a side view, partly in section, of anautomatic fan with my improvements; Fig. 2, an end view of a portion ofFig. 1, looking in the direction of the arrow; and Fig. 3, a sectionalplan on the line 1 2, Fig. 1, drawn to an enlarged scale.

Similar letters refer to similar parts throughout the several views.

A is the base of the instrument, and consists of a hollow boX,containing a coiled spring similar to that of an ordinary clock, or tothat described in my patent of September 6, 1859, any suitable system ofgearing being used for transmitting the motion of the spring to thevertical shaft B, which turns at the bottom in a plate, a, secured tothe inside of the box. This shaft B passes upward through the column G,which is secured to or forms a part of the base, and into a tube, D, theupper and lower ends of which are arranged to turn freely inthe externaltube, E, but can have no vertical or lateral movement independent of thelatter tube, which iits snugly, but so as to slide freely, in the upperend of the pillar (l, the latter being provided with a set-screw, e, bymfans of which thetube E and its adjuncts may be secured afteradjustment. It should be understood that the shaft B and the interior ofthe tube D are square or of such other form that while the tube canslide vertically on the shaft one cannot turn independently of theother. On the upper end of the tube. E is a platform, F, supporting twoplates, G and G', between which is a system of gearing similar to thatdescribed in my patent of September 6, 1859, this gearing being drivenby the wheel H, which is secured to a spindle attached to the upper endof the tube D. Frein the plate G" projects an arm, I, and beneath thelatter is a shaft, J, arranged to vibrate at one end in the said plate Gand at the opposite end in a projection on the arm I, the fan K beingsecured to the arm J, on which is a short arm, connected by a rod, m, tothe crank n on the spindle q, as in my aforesaid patent.

Thelever M, which projects through an opening on one side of the base,is for the purpose of winding up the spring which produces the motivepower. As this lever and its appliances and the mode of operation arefully described in the patentfora device for winding up clocks, Sac.,granted to me on the 2d day of August, 1859, further description will beunnecessary. In my patent for improvements in automatic fans, grantedSeptember 6, 1859, the spring and gearing were placed in closecontiguity with eachother, and on the top of acolumn, near the fan,which rendered the apparatus somewhat clumsy and unsteady. This isavoided in my present improvements by placing the spring', with itsappliances, (forming the heaviest portion of the machine,) within thebase A, which thus forms a weighted and firm foundation for the entireinstrument. As the tube E can be turned as well as raised and lowered inthe column C, and as the internal tube, D, can slide freely on the shaftB, it will be evident that the fan can be raised or lowered or turned toany desired position laterally without its movement being interrupted.

I wish it to be understood that I do not desire to confine myself to anyparticular construction or arrangement of parts constituting thedriving-gear situated within the base A, nor to any specific system ofgearing for imparting a vibrating motion tothe fan from the tubeD; but

I claim as my invention and desire to secure by Letters Patent- 1.ThebaseA, containing thedriving-spring, the column C, and adjustabletube E, carrying the fan K, in combination with the devices hereindescribed, or their equivalents, for transmitting motion from the springin the base to the fan Without interfering with the ready vertical andlateral adjustment of the latter, as set forth.

2. The internal tube, D, and external tube, E, (the lattercarryingthefan K,) and anysuitrcombination with the column C and shaft B,

the Whole being constructed and arranged substantially as and for thepurpose herein set forth.

In testimony whereof I have signed my naine to this specication in thepresence of two subscribing Witnesses.

JOHN B. PO\VELL.

Witnesses J. MAsoN BUnNs, WM. S. PoULsoN.

